公开(公告)号：US06501887B1

公开(公告)日：2002-12-31

申请号：US09651787

申请日：2000-08-30

申请人： Anne G. Bringuier ,  Jimmy B. Dameron ,  Samuel D. Nave

发明人： Anne G. Bringuier ,  Jimmy B. Dameron ,  Samuel D. Nave

IPC分类号： G02B644

CPC分类号： G02B6/4494 ,  G02B6/4436

摘要： A fiber optic cable having both water blocking and flame retardant properties that is particularly useful for indoor or indoor/outdoor applications. In one embodiment, the fiber optic cable includes at least one buffer tube, at least one optical fiber disposed within the buffer tube, a composite tape surrounding the buffer tube that comprises a layer formed of an inherently flame retardant material and at least one coating a water swellable material, and a jacket surrounding the composite tape. The fiber optic cable can also include a water blocking element disposed within the buffer tube. The water swellable coatings of the composite tape and the water blocking element within the buffer tube therefore inhibit water migration along the length of the cable, while the flame retardant layer of the composite tape provides fire resistance. In another aspect, a dry fiber optic cable that includes a buffer tube comprised of an inherently flame retardant material, at least one optical fiber disposed within the buffer tube, a first tape comprised of a water swellable material that at least partially surrounds the at least one optical fiber, at least one roving extending lengthwise along the buffer tube and having a coating comprised of a water swellable material, and a jacket surrounding the buffer tube and the at least one roving. As such, the buffer tube provides flame retardant properties, while the first tape and the water swellable coating of the at least one roving inhibit water migration along the length of the cable.

摘要翻译： 一种具有阻水性和阻燃性的光缆，其特别适用于室内/室外应用。 在一个实施例中，光纤电缆包括至少一个缓冲管，设置在缓冲管内的至少一个光纤，围绕缓冲管的复合带，其包括由固有阻燃材料形成的层和至少一个涂层 水可膨胀材料和围绕复合带的护套。 光纤电缆还可以包括设置在缓冲管内的阻水元件。 因此，缓冲管内的复合胶带和阻水元件的水可溶胀涂层因此阻止沿电缆长度的水迁移，而复合胶带的阻燃层提供耐火性。 另一方面，一种干式光缆，其包括由固有阻燃材料构成的缓冲管，设置在该缓冲管内的至少一根光纤，由至少部分地围绕该至少一部分的水可溶胀材料构成的第一条带 一个光纤，至少一条沿着缓冲管纵向延伸的粗纱，并具有由水溶胀材料构成的涂层，以及围绕缓冲管和至少一条粗纱的护套。 因此，缓冲管提供阻燃性能，而至少一种粗纱的第一带和水可溶胀涂层抑制沿电缆长度的水迁移。